Erkenntnis.

Vol. I-V and VIII, no. 1-4. Ed. R. Carnap und H. Reichenbach. Leipsic, F. Meiner (vol.I - V)/ The Hague, Van Stockum & Zoon (vol. VIII), 1930-1940, in 24 parts as issued, orig. unif. wr. - Spines faded; a few spine-ends sl. dam/ worn.

AND a series of ACTUALITÉS SCIENTIFIQUES ET INDUSTRIELLES (Paris, 1934-1951, 21 vols., orig. unif. (sl. worn) wr.). - ADDED: 28 issues of SYNTHESE. An International Journal for the Logical and Psychological Study of the Foundations of Science (Bussum, 1946-1950, orig. wr. Wrappers partly loose).